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1890年,美国一位名叫尤金的青年在纽约放飞了他从欧洲带回来的60只欧洲椋鸟,后来他又释放了40只。而今,无所不在的欧洲椋鸟不仅仅是噪音的制造者,而且还对美国的农业生产造成了巨大的影响。
![](http://img0.utuku.china.com/649x0/news/20170608/c5a9a3ab-b97f-4c2f-a264-76405624c665.jpg)
杀人蜂也叫“非洲化蜜蜂”,它的毒性很强,甚至可以蜇死人和动物。杀人蜂事实上是一种杂交蜜蜂。由于杀人蜂生命力强,繁殖速度快,它们已经在世界许多地区大肆漫延。
![](http://img2.utuku.china.com/650x0/news/20170608/64dc6390-d8ba-498e-92a6-9df7ecc8d44c.png)
1935年,澳洲人引入了20只海蟾蜍并投放到甘蔗园中,控制甘蔗园中的虫害。然而,海蟾蜍并没有起到灭虫的作用,反而带来了另一场灾难。海蟾蜍吃掉了身边所有的可能食物,对当地食物链造成严重影响。而且他们带有剧毒,对澳洲人具有性命威胁。
![](http://img3.utuku.china.com/650x0/news/20170608/b4985473-7ee0-46fd-a168-b9a7a6d626c9.jpg)
灰松鼠是一种原产于美国东部和加拿大东部等地区的松鼠,灰松鼠来到英国后成为了臭名昭著的入侵者。灰松鼠身上携带了一种致命病毒,感染当地红松鼠,严重影响了英国当地生态系统的平衡。
![](http://img0.utuku.china.com/650x0/news/20170608/ded91c8f-3c9d-417d-b272-0077b93261b8.jpg)
野葛是一种观赏性攀援植物,野葛在美国获得了两个外号,第一个外号是“吃掉南方的攀援植物”,第二个外号是“绿色危险物”。野葛在美国南方各州疯狂蔓延,泛滥成灾。美国土地上的野葛几乎没有任何天敌,它们的存在已经对美国南部各州造成了严重的生态灾难。
责任编辑:高宗影 CN060
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